This is the million-dollar question. The answer is:
While useful, using an auto clicker in GMod is not without its downsides. gmod auto clicker
If you have a gaming mouse, use the native software (G-Hub or Synapse). You can bind a "Rapid Fire" macro to a side button, which is often more stable and less likely to be flagged by basic anti-cheats. How to Set Up Your Auto Clicker This is the million-dollar question
Let me know how I can help you automate your GMod experience further! Share public link gmod auto clicker